Strontium phosphate
Strontium phosphate is the phosphate salt of strontium, with the molecular formula Sr3(PO4)2. It is a white solid insoluble in water.[5] Preparation and propertiesStrontium phosphate is commonly produced by the reaction of soluble strontium compounds, such as strontium nitrate, and a phosphate source, such as phosphoric acid or tripotassium phosphate, in water, resulting in a white precipitate of the tetrahydrate:[6][7]
Under water, the tetrahydrate slowly hydrolyses to strontium hydroxyapatite (Sr10(PO4)6(OH)2). The tetrahydrate decomposes to the anhydrous form when heated to 900 °C.[6][7] The anhydrous form can be produced without the presence of water, to avoid hydrolysis, by the heating of ammonium dihydrogen phosphate and strontium carbonate at 1030 °C and 30 MPa of pressure.[4][8] References
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